/*
 * Copyright (c) 2010-2016. Axon Framework
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.axonframework.eventhandling;

import org.axonframework.messaging.MessageHandler;

/**
 * Interface for an event message handler that defers handling to one or more other handlers.
 *
 * @author Rene de Waele
 */
public interface EventHandlerInvoker extends MessageHandler<EventMessage<?>> {

    /**
     * Check whether or not this invoker has handlers that can handle the given {@code eventMessage}.
     *
     * @param eventMessage The message to be processed
     * @return {@code true} if the invoker has one or more handlers that can handle the given message, {@code false}
     * otherwise
     */
    boolean hasHandler(EventMessage<?> eventMessage);

}
